After March 5, the retailer's gift cards will be worthless. Plus, even though he sold his entire stake, Warren Buffett calls Irving-based Exxon Mobil Corp. a "wonderful company." And, Mark Cuban cast as U.S. president in "Sharknado 3."

The nurse, who became one of the faces of the Ebola crisis in the Dallas, said the hospital violated her privacy and it didn't have proper training and equipment for its staff to combat the disease. Plus, a letter may give a clue about who will succeed the CEO of Berkshire Hathaway.